<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>fun</title>

<script type="text/javascript">
		abc = 80;
	// 函数的返回值
	num1=100;
	num2=200;
	function sum (num1,num2) {
	var he = num1+num2+abc;
		return he;
	}




</script>










</head>
<body>



</body>
</html>